As long as the first-past-the-post voting system is used in the US such movements will go nowhere. Unsurprisingly ranked-choice voting is mentioned as their first core value.
Other countries with first past the post voting regularly manage to have more than two parties. Canada, the UK, etc. I don't think the USes problems can be solely attributed to fist past the post voting (though it certainly doesn't help).
Parliamentary systems still devolve into two-party contests in each district though, it's more that the larger number of districts means that regional parties sometimes takes one of those two slots. At their peak the Lib Dems basically only ever won MPs from a few small regions of the country, mainly Somerset, Sheffield and London. The Greens have their one MP in Brighton, and then the other parties are all regional.
That's a lot to do with their policies though. The Greens are not really different to Labour, Lib Dems ... I don't think even they know what they stand for these days.
A better recent example was UKIP. A single issue party that managed to accrue enough of the vote that they got their issue implemented without ever having to win an election. In FTFP you can implement massive change in politics, without needing to actually replace one of the big parties.
If nothing else, RCV should help lower the political temperature in the US and soften the polarization that seems to be leading us to literal civil war.
Everyone is backed into a corner of supporting one or the other party, and it's started feeling like an increasingly high stakes game between the two that's only getting worse.
Lol we're nowhere near a civil war. The US is the the same as the pre-breakup USSR in that the peasant class fully knows that they'd be the biggest losers of any conflict or breakup.
Even with ranked choice the US will remain mostly two partied like the UK and some provinces in Canada. The parties are both so dominant already and well whipped, and not much chance coalitions form in this climate when these two parties aren't even in agreement of the same facts of reality. Maybe a centrist coalition designed to spoil dem votes.
Right, not only will they go nowhere but they will actively hurt the political party nearest to them ideologically unless those two parties agree to vote together on important issues.
